Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
5 | * | |
6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or (at | |
11 | * your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
21 | * | |
22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
23 | */ | |
24 | ||
25 | #include <linux/module.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/ioport.h> | |
d568df84 | 28 | #include <linux/kernel.h> |
1da177e4 LT |
29 | #include <linux/list.h> |
30 | #include <linux/sched.h> | |
31 | #include <linux/pm.h> | |
bca73e4b | 32 | #include <linux/pm_legacy.h> |
1da177e4 LT |
33 | #include <linux/device.h> |
34 | #include <linux/proc_fs.h> | |
35 | #ifdef CONFIG_X86 | |
36 | #include <asm/mpspec.h> | |
37 | #endif | |
38 | #include <acpi/acpi_bus.h> | |
39 | #include <acpi/acpi_drivers.h> | |
40 | ||
1da177e4 | 41 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 42 | ACPI_MODULE_NAME("bus"); |
1da177e4 LT |
43 | #ifdef CONFIG_X86 |
44 | extern void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger); | |
45 | #endif | |
46 | ||
4be44fcd LB |
47 | struct acpi_device *acpi_root; |
48 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
49 | EXPORT_SYMBOL(acpi_root_dir); |
50 | ||
51 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
52 | ||
53 | /* -------------------------------------------------------------------------- | |
54 | Device Management | |
55 | -------------------------------------------------------------------------- */ | |
56 | ||
4be44fcd | 57 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 58 | { |
4be44fcd | 59 | acpi_status status = AE_OK; |
1da177e4 | 60 | |
1da177e4 LT |
61 | |
62 | if (!device) | |
d550d98d | 63 | return -EINVAL; |
1da177e4 LT |
64 | |
65 | /* TBD: Support fixed-feature devices */ | |
66 | ||
4be44fcd | 67 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
1da177e4 | 68 | if (ACPI_FAILURE(status) || !*device) { |
9805cb76 LB |
69 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
70 | handle)); | |
d550d98d | 71 | return -ENODEV; |
1da177e4 LT |
72 | } |
73 | ||
d550d98d | 74 | return 0; |
1da177e4 | 75 | } |
4be44fcd | 76 | |
1da177e4 LT |
77 | EXPORT_SYMBOL(acpi_bus_get_device); |
78 | ||
4be44fcd | 79 | int acpi_bus_get_status(struct acpi_device *device) |
1da177e4 | 80 | { |
4be44fcd LB |
81 | acpi_status status = AE_OK; |
82 | unsigned long sta = 0; | |
83 | ||
1da177e4 LT |
84 | |
85 | if (!device) | |
d550d98d | 86 | return -EINVAL; |
1da177e4 LT |
87 | |
88 | /* | |
89 | * Evaluate _STA if present. | |
90 | */ | |
91 | if (device->flags.dynamic_status) { | |
4be44fcd LB |
92 | status = |
93 | acpi_evaluate_integer(device->handle, "_STA", NULL, &sta); | |
1da177e4 | 94 | if (ACPI_FAILURE(status)) |
d550d98d | 95 | return -ENODEV; |
4be44fcd | 96 | STRUCT_TO_INT(device->status) = (int)sta; |
1da177e4 LT |
97 | } |
98 | ||
99 | /* | |
100 | * Otherwise we assume the status of our parent (unless we don't | |
101 | * have one, in which case status is implied). | |
102 | */ | |
103 | else if (device->parent) | |
104 | device->status = device->parent->status; | |
105 | else | |
0c0e8921 BH |
106 | STRUCT_TO_INT(device->status) = |
107 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
108 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
1da177e4 LT |
109 | |
110 | if (device->status.functional && !device->status.present) { | |
111 | printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: " | |
4be44fcd LB |
112 | "functional but not present; setting present\n", |
113 | device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status)); | |
1da177e4 LT |
114 | device->status.present = 1; |
115 | } | |
116 | ||
4be44fcd LB |
117 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
118 | device->pnp.bus_id, | |
119 | (u32) STRUCT_TO_INT(device->status))); | |
1da177e4 | 120 | |
d550d98d | 121 | return 0; |
1da177e4 | 122 | } |
1da177e4 | 123 | |
4be44fcd | 124 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 LT |
125 | |
126 | /* -------------------------------------------------------------------------- | |
127 | Power Management | |
128 | -------------------------------------------------------------------------- */ | |
129 | ||
4be44fcd | 130 | int acpi_bus_get_power(acpi_handle handle, int *state) |
1da177e4 | 131 | { |
4be44fcd LB |
132 | int result = 0; |
133 | acpi_status status = 0; | |
134 | struct acpi_device *device = NULL; | |
135 | unsigned long psc = 0; | |
1da177e4 | 136 | |
1da177e4 LT |
137 | |
138 | result = acpi_bus_get_device(handle, &device); | |
139 | if (result) | |
d550d98d | 140 | return result; |
1da177e4 LT |
141 | |
142 | *state = ACPI_STATE_UNKNOWN; | |
143 | ||
144 | if (!device->flags.power_manageable) { | |
145 | /* TBD: Non-recursive algorithm for walking up hierarchy */ | |
146 | if (device->parent) | |
147 | *state = device->parent->power.state; | |
148 | else | |
149 | *state = ACPI_STATE_D0; | |
4be44fcd | 150 | } else { |
1da177e4 | 151 | /* |
aafbcd16 | 152 | * Get the device's power state either directly (via _PSC) or |
1da177e4 LT |
153 | * indirectly (via power resources). |
154 | */ | |
155 | if (device->power.flags.explicit_get) { | |
4be44fcd LB |
156 | status = acpi_evaluate_integer(device->handle, "_PSC", |
157 | NULL, &psc); | |
1da177e4 | 158 | if (ACPI_FAILURE(status)) |
d550d98d | 159 | return -ENODEV; |
4be44fcd LB |
160 | device->power.state = (int)psc; |
161 | } else if (device->power.flags.power_resources) { | |
1da177e4 LT |
162 | result = acpi_power_get_inferred_state(device); |
163 | if (result) | |
d550d98d | 164 | return result; |
1da177e4 LT |
165 | } |
166 | ||
167 | *state = device->power.state; | |
168 | } | |
169 | ||
170 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", | |
4be44fcd | 171 | device->pnp.bus_id, device->power.state)); |
1da177e4 | 172 | |
d550d98d | 173 | return 0; |
1da177e4 | 174 | } |
1da177e4 | 175 | |
4be44fcd | 176 | EXPORT_SYMBOL(acpi_bus_get_power); |
1da177e4 | 177 | |
4be44fcd | 178 | int acpi_bus_set_power(acpi_handle handle, int state) |
1da177e4 | 179 | { |
4be44fcd LB |
180 | int result = 0; |
181 | acpi_status status = AE_OK; | |
182 | struct acpi_device *device = NULL; | |
183 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; | |
1da177e4 | 184 | |
1da177e4 LT |
185 | |
186 | result = acpi_bus_get_device(handle, &device); | |
187 | if (result) | |
d550d98d | 188 | return result; |
1da177e4 LT |
189 | |
190 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) | |
d550d98d | 191 | return -EINVAL; |
1da177e4 LT |
192 | |
193 | /* Make sure this is a valid target state */ | |
194 | ||
195 | if (!device->flags.power_manageable) { | |
9805cb76 | 196 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n", |
f883d9db | 197 | device->dev.kobj.name)); |
d550d98d | 198 | return -ENODEV; |
1da177e4 | 199 | } |
b913100d DSL |
200 | /* |
201 | * Get device's current power state if it's unknown | |
202 | * This means device power state isn't initialized or previous setting failed | |
203 | */ | |
b1028c54 KK |
204 | if ((device->power.state == ACPI_STATE_UNKNOWN) || device->flags.force_power_state) |
205 | acpi_bus_get_power(device->handle, &device->power.state); | |
206 | if ((state == device->power.state) && !device->flags.force_power_state) { | |
207 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", | |
208 | state)); | |
209 | return 0; | |
1da177e4 | 210 | } |
b1028c54 | 211 | |
1da177e4 | 212 | if (!device->power.states[state].flags.valid) { |
cece9296 | 213 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
d550d98d | 214 | return -ENODEV; |
1da177e4 LT |
215 | } |
216 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 217 | printk(KERN_WARNING PREFIX |
a6fc6720 | 218 | "Cannot set device to a higher-powered" |
cece9296 | 219 | " state than parent\n"); |
d550d98d | 220 | return -ENODEV; |
1da177e4 LT |
221 | } |
222 | ||
223 | /* | |
224 | * Transition Power | |
225 | * ---------------- | |
226 | * On transitions to a high-powered state we first apply power (via | |
227 | * power resources) then evalute _PSx. Conversly for transitions to | |
228 | * a lower-powered state. | |
b913100d | 229 | */ |
1da177e4 LT |
230 | if (state < device->power.state) { |
231 | if (device->power.flags.power_resources) { | |
232 | result = acpi_power_transition(device, state); | |
233 | if (result) | |
234 | goto end; | |
235 | } | |
236 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
237 | status = acpi_evaluate_object(device->handle, |
238 | object_name, NULL, NULL); | |
1da177e4 LT |
239 | if (ACPI_FAILURE(status)) { |
240 | result = -ENODEV; | |
241 | goto end; | |
242 | } | |
243 | } | |
4be44fcd | 244 | } else { |
1da177e4 | 245 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
246 | status = acpi_evaluate_object(device->handle, |
247 | object_name, NULL, NULL); | |
1da177e4 LT |
248 | if (ACPI_FAILURE(status)) { |
249 | result = -ENODEV; | |
250 | goto end; | |
251 | } | |
252 | } | |
253 | if (device->power.flags.power_resources) { | |
254 | result = acpi_power_transition(device, state); | |
255 | if (result) | |
256 | goto end; | |
257 | } | |
258 | } | |
259 | ||
4be44fcd | 260 | end: |
1da177e4 | 261 | if (result) |
cece9296 LB |
262 | printk(KERN_WARNING PREFIX |
263 | "Transitioning device [%s] to D%d\n", | |
264 | device->pnp.bus_id, state); | |
5e32132b SL |
265 | else { |
266 | device->power.state = state; | |
4be44fcd LB |
267 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
268 | "Device [%s] transitioned to D%d\n", | |
269 | device->pnp.bus_id, state)); | |
5e32132b | 270 | } |
1da177e4 | 271 | |
d550d98d | 272 | return result; |
1da177e4 | 273 | } |
1da177e4 | 274 | |
4be44fcd | 275 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 LT |
276 | |
277 | /* -------------------------------------------------------------------------- | |
278 | Event Management | |
279 | -------------------------------------------------------------------------- */ | |
280 | ||
14e04fb3 | 281 | #ifdef CONFIG_ACPI_PROC_EVENT |
1da177e4 LT |
282 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
283 | ||
284 | LIST_HEAD(acpi_bus_event_list); | |
285 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
286 | ||
4be44fcd | 287 | extern int event_is_open; |
1da177e4 | 288 | |
14e04fb3 | 289 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) |
1da177e4 | 290 | { |
4be44fcd LB |
291 | struct acpi_bus_event *event = NULL; |
292 | unsigned long flags = 0; | |
1da177e4 | 293 | |
1da177e4 LT |
294 | |
295 | if (!device) | |
d550d98d | 296 | return -EINVAL; |
1da177e4 LT |
297 | |
298 | /* drop event on the floor if no one's listening */ | |
299 | if (!event_is_open) | |
d550d98d | 300 | return 0; |
1da177e4 LT |
301 | |
302 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
303 | if (!event) | |
d550d98d | 304 | return -ENOMEM; |
1da177e4 LT |
305 | |
306 | strcpy(event->device_class, device->pnp.device_class); | |
307 | strcpy(event->bus_id, device->pnp.bus_id); | |
308 | event->type = type; | |
309 | event->data = data; | |
310 | ||
311 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
312 | list_add_tail(&event->node, &acpi_bus_event_list); | |
313 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
314 | ||
315 | wake_up_interruptible(&acpi_bus_event_queue); | |
316 | ||
d550d98d | 317 | return 0; |
1da177e4 | 318 | } |
4be44fcd | 319 | |
14e04fb3 | 320 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
1da177e4 | 321 | |
4be44fcd | 322 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 323 | { |
4be44fcd LB |
324 | unsigned long flags = 0; |
325 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
326 | |
327 | DECLARE_WAITQUEUE(wait, current); | |
328 | ||
1da177e4 LT |
329 | |
330 | if (!event) | |
d550d98d | 331 | return -EINVAL; |
1da177e4 LT |
332 | |
333 | if (list_empty(&acpi_bus_event_list)) { | |
334 | ||
335 | set_current_state(TASK_INTERRUPTIBLE); | |
336 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
337 | ||
338 | if (list_empty(&acpi_bus_event_list)) | |
339 | schedule(); | |
340 | ||
341 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
342 | set_current_state(TASK_RUNNING); | |
343 | ||
344 | if (signal_pending(current)) | |
d550d98d | 345 | return -ERESTARTSYS; |
1da177e4 LT |
346 | } |
347 | ||
348 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
4be44fcd LB |
349 | entry = |
350 | list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node); | |
1da177e4 LT |
351 | if (entry) |
352 | list_del(&entry->node); | |
353 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
354 | ||
355 | if (!entry) | |
d550d98d | 356 | return -ENODEV; |
1da177e4 LT |
357 | |
358 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
359 | ||
360 | kfree(entry); | |
361 | ||
d550d98d | 362 | return 0; |
1da177e4 | 363 | } |
1da177e4 | 364 | |
4be44fcd | 365 | EXPORT_SYMBOL(acpi_bus_receive_event); |
14e04fb3 | 366 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
1da177e4 LT |
367 | |
368 | /* -------------------------------------------------------------------------- | |
369 | Notification Handling | |
370 | -------------------------------------------------------------------------- */ | |
371 | ||
372 | static int | |
4be44fcd | 373 | acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
1da177e4 | 374 | { |
4be44fcd | 375 | acpi_status status = 0; |
1da177e4 LT |
376 | struct acpi_device_status old_status; |
377 | ||
1da177e4 LT |
378 | |
379 | if (!device) | |
d550d98d | 380 | return -EINVAL; |
1da177e4 LT |
381 | |
382 | if (status_changed) | |
383 | *status_changed = 0; | |
384 | ||
385 | old_status = device->status; | |
386 | ||
387 | /* | |
388 | * Make sure this device's parent is present before we go about | |
389 | * messing with the device. | |
390 | */ | |
391 | if (device->parent && !device->parent->status.present) { | |
392 | device->status = device->parent->status; | |
393 | if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { | |
394 | if (status_changed) | |
395 | *status_changed = 1; | |
396 | } | |
d550d98d | 397 | return 0; |
1da177e4 LT |
398 | } |
399 | ||
400 | status = acpi_bus_get_status(device); | |
401 | if (ACPI_FAILURE(status)) | |
d550d98d | 402 | return -ENODEV; |
1da177e4 LT |
403 | |
404 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
d550d98d | 405 | return 0; |
1da177e4 LT |
406 | |
407 | if (status_changed) | |
408 | *status_changed = 1; | |
4be44fcd | 409 | |
1da177e4 LT |
410 | /* |
411 | * Device Insertion/Removal | |
412 | */ | |
413 | if ((device->status.present) && !(old_status.present)) { | |
414 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
415 | /* TBD: Handle device insertion */ | |
4be44fcd | 416 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
417 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
418 | /* TBD: Handle device removal */ | |
419 | } | |
420 | ||
d550d98d | 421 | return 0; |
1da177e4 LT |
422 | } |
423 | ||
4be44fcd | 424 | static int acpi_bus_check_scope(struct acpi_device *device) |
1da177e4 | 425 | { |
4be44fcd LB |
426 | int result = 0; |
427 | int status_changed = 0; | |
1da177e4 | 428 | |
1da177e4 LT |
429 | |
430 | if (!device) | |
d550d98d | 431 | return -EINVAL; |
1da177e4 LT |
432 | |
433 | /* Status Change? */ | |
434 | result = acpi_bus_check_device(device, &status_changed); | |
435 | if (result) | |
d550d98d | 436 | return result; |
1da177e4 LT |
437 | |
438 | if (!status_changed) | |
d550d98d | 439 | return 0; |
1da177e4 LT |
440 | |
441 | /* | |
442 | * TBD: Enumerate child devices within this device's scope and | |
443 | * run acpi_bus_check_device()'s on them. | |
444 | */ | |
445 | ||
d550d98d | 446 | return 0; |
1da177e4 LT |
447 | } |
448 | ||
1da177e4 LT |
449 | /** |
450 | * acpi_bus_notify | |
451 | * --------------- | |
452 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
453 | */ | |
4be44fcd | 454 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 455 | { |
4be44fcd LB |
456 | int result = 0; |
457 | struct acpi_device *device = NULL; | |
1da177e4 | 458 | |
1da177e4 LT |
459 | |
460 | if (acpi_bus_get_device(handle, &device)) | |
d550d98d | 461 | return; |
1da177e4 LT |
462 | |
463 | switch (type) { | |
464 | ||
465 | case ACPI_NOTIFY_BUS_CHECK: | |
4be44fcd LB |
466 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
467 | "Received BUS CHECK notification for device [%s]\n", | |
468 | device->pnp.bus_id)); | |
1da177e4 | 469 | result = acpi_bus_check_scope(device); |
aafbcd16 | 470 | /* |
1da177e4 | 471 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 472 | * drivers via the device manager (device.c). |
1da177e4 LT |
473 | */ |
474 | break; | |
475 | ||
476 | case ACPI_NOTIFY_DEVICE_CHECK: | |
4be44fcd LB |
477 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
478 | "Received DEVICE CHECK notification for device [%s]\n", | |
479 | device->pnp.bus_id)); | |
1da177e4 | 480 | result = acpi_bus_check_device(device, NULL); |
aafbcd16 | 481 | /* |
1da177e4 | 482 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 483 | * drivers via the device manager (device.c). |
1da177e4 LT |
484 | */ |
485 | break; | |
486 | ||
487 | case ACPI_NOTIFY_DEVICE_WAKE: | |
4be44fcd LB |
488 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
489 | "Received DEVICE WAKE notification for device [%s]\n", | |
490 | device->pnp.bus_id)); | |
1da177e4 LT |
491 | /* TBD */ |
492 | break; | |
493 | ||
494 | case ACPI_NOTIFY_EJECT_REQUEST: | |
4be44fcd LB |
495 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
496 | "Received EJECT REQUEST notification for device [%s]\n", | |
497 | device->pnp.bus_id)); | |
1da177e4 LT |
498 | /* TBD */ |
499 | break; | |
500 | ||
501 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
4be44fcd LB |
502 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
503 | "Received DEVICE CHECK LIGHT notification for device [%s]\n", | |
504 | device->pnp.bus_id)); | |
1da177e4 LT |
505 | /* TBD: Exactly what does 'light' mean? */ |
506 | break; | |
507 | ||
508 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
4be44fcd LB |
509 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
510 | "Received FREQUENCY MISMATCH notification for device [%s]\n", | |
511 | device->pnp.bus_id)); | |
1da177e4 LT |
512 | /* TBD */ |
513 | break; | |
514 | ||
515 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
4be44fcd LB |
516 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
517 | "Received BUS MODE MISMATCH notification for device [%s]\n", | |
518 | device->pnp.bus_id)); | |
1da177e4 LT |
519 | /* TBD */ |
520 | break; | |
521 | ||
522 | case ACPI_NOTIFY_POWER_FAULT: | |
4be44fcd LB |
523 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
524 | "Received POWER FAULT notification for device [%s]\n", | |
525 | device->pnp.bus_id)); | |
1da177e4 LT |
526 | /* TBD */ |
527 | break; | |
528 | ||
529 | default: | |
4be44fcd LB |
530 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
531 | "Received unknown/unsupported notification [%08x]\n", | |
532 | type)); | |
1da177e4 LT |
533 | break; |
534 | } | |
535 | ||
d550d98d | 536 | return; |
1da177e4 LT |
537 | } |
538 | ||
539 | /* -------------------------------------------------------------------------- | |
540 | Initialization/Cleanup | |
541 | -------------------------------------------------------------------------- */ | |
542 | ||
4be44fcd | 543 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 544 | { |
4be44fcd LB |
545 | acpi_status status = AE_OK; |
546 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
547 | struct acpi_object_list arg_list = { 1, &arg }; | |
548 | char *message = NULL; | |
1da177e4 | 549 | |
1da177e4 | 550 | |
aafbcd16 | 551 | /* |
1da177e4 LT |
552 | * Let the system know what interrupt model we are using by |
553 | * evaluating the \_PIC object, if exists. | |
554 | */ | |
555 | ||
556 | switch (acpi_irq_model) { | |
557 | case ACPI_IRQ_MODEL_PIC: | |
558 | message = "PIC"; | |
559 | break; | |
560 | case ACPI_IRQ_MODEL_IOAPIC: | |
561 | message = "IOAPIC"; | |
562 | break; | |
563 | case ACPI_IRQ_MODEL_IOSAPIC: | |
564 | message = "IOSAPIC"; | |
565 | break; | |
3948ec94 JK |
566 | case ACPI_IRQ_MODEL_PLATFORM: |
567 | message = "platform specific model"; | |
568 | break; | |
1da177e4 LT |
569 | default: |
570 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 571 | return -ENODEV; |
1da177e4 LT |
572 | } |
573 | ||
574 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
575 | ||
576 | arg.integer.value = acpi_irq_model; | |
577 | ||
578 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
579 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 580 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 581 | return -ENODEV; |
1da177e4 LT |
582 | } |
583 | ||
d550d98d | 584 | return 0; |
1da177e4 LT |
585 | } |
586 | ||
ad71860a AS |
587 | acpi_native_uint acpi_gbl_permanent_mmap; |
588 | ||
589 | ||
4be44fcd | 590 | void __init acpi_early_init(void) |
1da177e4 | 591 | { |
4be44fcd | 592 | acpi_status status = AE_OK; |
1da177e4 LT |
593 | |
594 | if (acpi_disabled) | |
d550d98d | 595 | return; |
1da177e4 | 596 | |
61686124 BM |
597 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
598 | ||
1da177e4 LT |
599 | /* enable workarounds, unless strict ACPI spec. compliance */ |
600 | if (!acpi_strict) | |
601 | acpi_gbl_enable_interpreter_slack = TRUE; | |
602 | ||
ad71860a AS |
603 | acpi_gbl_permanent_mmap = 1; |
604 | ||
605 | status = acpi_reallocate_root_table(); | |
606 | if (ACPI_FAILURE(status)) { | |
607 | printk(KERN_ERR PREFIX | |
608 | "Unable to reallocate ACPI tables\n"); | |
609 | goto error0; | |
610 | } | |
611 | ||
1da177e4 LT |
612 | status = acpi_initialize_subsystem(); |
613 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
614 | printk(KERN_ERR PREFIX |
615 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
616 | goto error0; |
617 | } | |
618 | ||
619 | status = acpi_load_tables(); | |
620 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
621 | printk(KERN_ERR PREFIX |
622 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
623 | goto error0; |
624 | } | |
625 | ||
1da177e4 LT |
626 | #ifdef CONFIG_X86 |
627 | if (!acpi_ioapic) { | |
5f3b1a8b | 628 | extern u8 acpi_sci_flags; |
1da177e4 LT |
629 | |
630 | /* compatible (0) means level (3) */ | |
5f3b1a8b AS |
631 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
632 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
633 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
634 | } | |
1da177e4 | 635 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 636 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 637 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 LT |
638 | } else { |
639 | extern int acpi_sci_override_gsi; | |
640 | /* | |
cee324b1 | 641 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
642 | * update it with result from INT_SRC_OVR parsing |
643 | */ | |
cee324b1 | 644 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
645 | } |
646 | #endif | |
647 | ||
4be44fcd LB |
648 | status = |
649 | acpi_enable_subsystem(~ | |
650 | (ACPI_NO_HARDWARE_INIT | | |
651 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
652 | if (ACPI_FAILURE(status)) { |
653 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
654 | goto error0; | |
655 | } | |
656 | ||
d550d98d | 657 | return; |
1da177e4 | 658 | |
4be44fcd | 659 | error0: |
1da177e4 | 660 | disable_acpi(); |
d550d98d | 661 | return; |
1da177e4 LT |
662 | } |
663 | ||
4be44fcd | 664 | static int __init acpi_bus_init(void) |
1da177e4 | 665 | { |
4be44fcd LB |
666 | int result = 0; |
667 | acpi_status status = AE_OK; | |
668 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 669 | |
1da177e4 LT |
670 | |
671 | status = acpi_os_initialize1(); | |
672 | ||
4be44fcd LB |
673 | status = |
674 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 675 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
676 | printk(KERN_ERR PREFIX |
677 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
678 | goto error1; |
679 | } | |
680 | ||
681 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
682 | printk(KERN_ERR PREFIX |
683 | "Unable to initialize ACPI OS objects\n"); | |
1da177e4 LT |
684 | goto error1; |
685 | } | |
686 | #ifdef CONFIG_ACPI_EC | |
687 | /* | |
688 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
689 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
690 | * is called). | |
691 | * | |
aafbcd16 | 692 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
693 | * the EC parameters out of that. |
694 | */ | |
695 | status = acpi_ec_ecdt_probe(); | |
696 | /* Ignore result. Not having an ECDT is not fatal. */ | |
697 | #endif | |
698 | ||
699 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
700 | if (ACPI_FAILURE(status)) { | |
701 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
702 | goto error1; | |
703 | } | |
704 | ||
705 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); | |
706 | ||
aafbcd16 AS |
707 | /* Initialize sleep structures */ |
708 | acpi_sleep_init(); | |
709 | ||
1da177e4 LT |
710 | /* |
711 | * Get the system interrupt model and evaluate \_PIC. | |
712 | */ | |
713 | result = acpi_bus_init_irq(); | |
714 | if (result) | |
715 | goto error1; | |
716 | ||
717 | /* | |
718 | * Register the for all standard device notifications. | |
719 | */ | |
4be44fcd LB |
720 | status = |
721 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
722 | &acpi_bus_notify, NULL); | |
1da177e4 | 723 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
724 | printk(KERN_ERR PREFIX |
725 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
726 | goto error1; |
727 | } | |
728 | ||
729 | /* | |
730 | * Create the top ACPI proc directory | |
731 | */ | |
732 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
733 | ||
d550d98d | 734 | return 0; |
1da177e4 LT |
735 | |
736 | /* Mimic structured exception handling */ | |
4be44fcd | 737 | error1: |
1da177e4 | 738 | acpi_terminate(); |
d550d98d | 739 | return -ENODEV; |
1da177e4 LT |
740 | } |
741 | ||
4be44fcd | 742 | decl_subsys(acpi, NULL, NULL); |
1da177e4 | 743 | |
4be44fcd | 744 | static int __init acpi_init(void) |
1da177e4 | 745 | { |
4be44fcd | 746 | int result = 0; |
1da177e4 | 747 | |
1da177e4 | 748 | |
1da177e4 LT |
749 | if (acpi_disabled) { |
750 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 751 | return -ENODEV; |
1da177e4 LT |
752 | } |
753 | ||
d568df84 RD |
754 | result = firmware_register(&acpi_subsys); |
755 | if (result < 0) | |
756 | printk(KERN_WARNING "%s: firmware_register error: %d\n", | |
757 | __FUNCTION__, result); | |
1da177e4 LT |
758 | |
759 | result = acpi_bus_init(); | |
760 | ||
761 | if (!result) { | |
bca73e4b | 762 | #ifdef CONFIG_PM_LEGACY |
1da177e4 LT |
763 | if (!PM_IS_ACTIVE()) |
764 | pm_active = 1; | |
765 | else { | |
4be44fcd LB |
766 | printk(KERN_INFO PREFIX |
767 | "APM is already active, exiting\n"); | |
1da177e4 LT |
768 | disable_acpi(); |
769 | result = -ENODEV; | |
770 | } | |
771 | #endif | |
772 | } else | |
773 | disable_acpi(); | |
774 | ||
d550d98d | 775 | return result; |
1da177e4 LT |
776 | } |
777 | ||
778 | subsys_initcall(acpi_init); |